CM850 Electronic Control System – FAULT CODE 227 (QSB Marine Application)

Sensor Supply 2 Circuit – Voltage Above Normal or Shorted to High Source


Overview

CODE REASON EFFECT
Fault Code: 227
PID: S232
SPN: 1080
FMI: 3/3
LAMP: Amber
SRT: 

Sensor Supply 2 Circuit – Voltage Above Normal or Shorted to High Source. High voltage detected at sensor supply number 2 circuit.

Marine application: None, no engine protection for circuit or sensor failure.

Sensor Supply Voltage Number 2 Circuit
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Circuit Description

The sensor supply number 2 pin of the electronic control module (ECM)
provides +5 VDC for the intake manifold pressure sensor, and rail fuel pressure sensor. ISB and QSB5.9 use a combined intake manifold pressure/temperature sensor.

Component Location

Sensor supply voltage number 2 is located inside the ECM. Refer to Procedure 100-002 for a detailed component location view.

Shop Talk

High voltage on the +5 VDC supply line can be caused by a signal shorted to battery voltage in the engine harness or connectors, or a failed ECM.

Refer to Troubleshooting Fault Code t05-227

Last Modified:  08-Jul-2010